Display substrate, manufacturing method thereof and three-dimensional display apparatus

Abstract

The present disclosure provides a display substrate, a manufacturing method thereof and a three-dimensional display apparatus. The display substrate includes a base substrate with a plurality of sub-pixels. Each of the sub-pixels includes at least two first electrodes, and a light-emitting function layer disposed on a side of the first electrodes facing away from the base substrate. Each first electrode includes: a transparent conductive portion and a reflective conductive portion arranged in stack. In at least one of the sub-pixels, two adjacent first electrodes correspond to one reflective structure, the reflective structure includes a first portion and a second portion, an orthographic projection of the first portion on the base substrate and an orthographic projection of one first electrode have an overlap area, and an orthographic projection of the second portion on the base substrate an orthographic projection of another first electrode have an overlap area.

What is claimed is: 
     
       1. A display substrate, comprising:
 a base substrate;
 a plurality of sub-pixels, wherein in each of the plurality of sub-pixels, at least two first electrodes and a light-emitting function layer disposed on a side of the at least two first electrodes facing away from the base substrate are provided; and each of the at least two electrodes comprises: a transparent conductive portion and a reflective conductive portion arranged in a stack; 
 
 an insulation layer, disposed between a layer where the at least two first electrodes are located and the base substrate; and 
 a plurality of reflective structures, located between the insulation layer and the base substrate; 
 wherein
 in at least one of the plurality of sub-pixels, two adjacent first electrodes are correspondingly provided with one of the plurality of reflective structures; 
 the one of the plurality of reflective structures comprises a first portion and a second portion, an orthographic projection of the first portion on the base substrate and an orthographic projection of one of the two adjacent first electrodes on the base substrate have an overlap area, and an orthographic projection of the second portion on the base substrate and an orthographic projection of another one of the two adjacent first electrodes on the base substrate have an overlap area; 
 wherein the one of the plurality of reflective structures further comprises a third portion; 
 a distance between the third portion and the light-emitting function layer in a direction perpendicular to the base substrate is smaller than a distance between the first portion and the light-emitting function layer in the direction perpendicular to the base substrate, and smaller than a distance between the second portion and the light-emitting function layer in the direction perpendicular to the base substrate. 
 
 
     
     
       2. The display substrate according to  claim 1 , wherein the third portion is located between the first portion and the second portion. 
     
     
       3. The display substrate according to  claim 1 , wherein an orthographic projection of the reflective conductive portion on the base substrate is located within an orthographic projection of the transparent conductive portion on the base substrate. 
     
     
       4. The display substrate according to  claim 3 , wherein the transparent conductive portion comprises: a first transparent conductive portion disposed on a side of the reflective conductive portion facing the base substrate, and a second transparent conductive portion disposed on a side of the reflective conductive portion facing away from the base substrate, wherein
 a portion of the second transparent conductive portion exceeding the reflective conductive portion comprises:
 a slope obliquely extending towards the base substrate; and 
 an edge flat portion in contact with the slope. 
 
 
     
     
       5. The display substrate according to  claim 4 , further comprising: a plurality of transparent protective electrodes disposed on a side of the layer where the plurality of first electrodes are located facing away from the base substrate, wherein
 the plurality of transparent protective electrodes correspond to the plurality of first electrodes; and 
 an orthographic projection of one of the plurality of transparent protective electrode on the base substrate at least covers an orthographic projection of an edge flat portion in a corresponding first electrode on the base substrate. 
 
     
     
       6. The display substrate according to  claim 5 , wherein
 in each of the plurality of sub-pixels, the at least two first electrodes are arranged in a first direction and extend in a second direction; and 
 a width of the transparent protective electrode in the first direction is larger than or equal to a width of the corresponding first electrode in the first direction; and 
 a length of the transparent protective electrode in the second direction is larger than or equal to a length of the corresponding first electrode in the second direction. 
 
     
     
       7. The display substrate according to  claim 1 , further comprising:
 a planarization layer disposed between the base substrate and a layer where the plurality of reflective structures are located; wherein, the reflective structures are arranged in grooves of the planarization layer. 
 
     
     
       8. The display substrate according to  claim 7 , further comprising: a plurality of pixel driving circuits located between the base substrate and the planarization layer, wherein
 the pixel driving circuits are corresponding electrically connected to the first electrodes through via holes running through the insulation layer and the planarization layer. 
 
     
     
       9. The display substrate according to  claim 8 , wherein the via holes are sequentially arranged in the first direction and are at edges of a same side of corresponding first electrodes. 
     
     
       10. The display substrate according to  claim 1 , wherein in a direction perpendicular to the base substrate, a thickness of the reflective conductive portion is larger than or equal to 200 Å and smaller than or equal to 2000 Å. 
     
     
       11. The display substrate according to  claim 4 , wherein at a side close to the reflective conductive portion, an included angle between the slope and the base substrate is larger than or equal to 30° and smaller than or equal to 60°. 
     
     
       12. The display substrate according to  claim 5 , wherein in each of the plurality of sub-pixels,
 a maximum distance between the first portion and the second portion is larger than 2 μm and smaller than or equal to 5 μm; 
 a minimum distance between the first portion and the second portion is larger than 1 μm and smaller than or equal to 2 μm; and 
 a gap between the transparent protective electrodes is larger than 0 μm and smaller than or equal to 2 μm. 
 
     
     
       13. The display substrate according to  claim 1 , wherein a material of the insulation layer is an inorganic insulation material. 
     
     
       14. A three-dimensional display apparatus, comprising:
 a display substrate; and 
 a spectrometer disposed on a display side of the display substrate; 
 wherein the display substrate comprises:
 a base substrate; wherein
 the base substrate comprises a plurality of sub-pixels, in each of the plurality of sub-pixels, at least two first electrodes and a light-emitting function layer disposed on a side of the at least two first electrodes facing away from the base substrate are provided; and each of the at least two electrodes comprises: a transparent conductive portion and a reflective conductive portion arranged in a stack; 
 
 an insulation layer, disposed between a layer where the at least two first electrodes are located and the base substrate; and 
 a plurality of reflective structures, located between the insulation layer and the base substrate; 
 wherein
 in at least one of the plurality of sub-pixels, two adjacent first electrodes are correspondingly provided with one of the plurality of reflective structures; 
 the one of the plurality of reflective structures comprises a first portion and a second portion, an orthographic projection of the first portion on the base substrate and an orthographic projection of one of the two adjacent first electrodes on the base substrate have an overlap area, and an orthographic projection of the second portion on the base substrate and an orthographic projection of another one of the two adjacent first electrodes on the base substrate have an overlap area; 
 wherein the one of the plurality of reflective structures further comprises a third portion; 
 a distance between the third portion and the light-emitting function layer in a direction perpendicular to the base substrate is smaller than a distance between the first portion and the light-emitting function layer in the direction perpendicular to the base substrate, and smaller than a distance between the second portion and the light-emitting function layer in the direction perpendicular to the base substrate. 
 
 
 
     
     
       15. The three-dimensional display apparatus according to  claim 14 , wherein an orthographic projection of the reflective conductive portion on the base substrate is located within an orthographic projection of the transparent conductive portion on the base substrate. 
     
     
       16. A manufacturing method of the display substrate according to  claim 1 , comprising:
 providing the base substrate; 
 forming the plurality of reflective structures on the base substrate; 
 forming the insulation layer on a layer where the plurality of reflective structures are located; and 
 forming the plurality of sub-pixels on the insulation layer. 
 
     
     
       17. The manufacturing method according to  claim 16 , wherein the forming the plurality of first electrodes comprises:
 forming a first transparent conductive material layer, a reflective conductive material layer and a second transparent conductive material layer on the insulation layer in sequence; and 
 etching the first transparent conductive material layer, the reflective conductive material layer and the second transparent conductive material layer by using a same etching process so as to form a plurality of first electrodes; 
 wherein each first electrode comprises the first transparent conductive portion, the reflective conductive portion and the second transparent conductive portion, wherein a portion of the second transparent conductive portion exceeding the reflective conductive portion comprises: a slope obliquely extending towards the base substrate, and an edge flat portion in contact with the slope; and in the same sub-pixel, all the at least two first electrodes are arranged in the first direction and extend in the second direction. 
 
     
     
       18. The manufacturing method according to  claim 16 , wherein after forming the plurality of first electrodes and before forming the light-emitting function layer, the method further comprises:
 forming a plurality of transparent protective electrodes on a side of a layer where the first electrodes are located facing away from the base substrate; 
 wherein the plurality of transparent protective electrodes correspond to the plurality of first electrodes;
 a width of the transparent protective electrode in a first direction is larger than a width of a corresponding first electrode in the first direction; and 
 a length of the transparent protective electrode in a second direction is larger than a length of the corresponding first electrode in the second direction.